Stereogum are currently running an article detailing their 50 most downloaded mp3’s of 2010. I’ve only had time for a quick peruse, and I’ve grabbed three which really jumped out at me. Happily, they’ve all turned out to be pretty good. Oh yeah, they’re all cover versions.
Major Lazer & Elephant Man – Halo (Originally by Beyoncé)
Suprisingly melodic, I was half-expecting a dancehall version, although I couldn’t quite imagine one. Instead Major Lazer have delivered a beautifully melodic, bleep-free version of the Beyoncé original. Vocals from Elephant Man are deep and soulful. Not what I expected but a very good track indeed!
Vampire Weekend – Ruby Soho (Originally by Rancid)
The punk of Rancid is converted into something a whole lot more pleasant on the ears in one of Vampire Weekend’s better covers.
Hot Chip – She Wolf (Originally by Shakira)
As my homemade (would you believe it!?) illustration shows, this is something of a surprising cover. You probably didn’t really need me to tell you that, but what comes out of it is something surprisingly good and tuneful. I have to say the originally sounds more polished but with a little work and minus Alexis Taylor’s wailing, this could be quite a big track in it’s own right.
Compromise Music 
you should check out ceo’s version of halo – major.
http://www.lucyvstheglobe.com/ceo-covers-my-music-jesus-joyous-joyous-joyous-day